Topography by J.T. Schultz, R.G. Shirley, T.B. McNeill, and H. McDermith. Filing title: Watseka, Ill.-Ind. Polyconic projection. Relief shown by contours and spot heights. Shows portions of Iroquois County, Illinois, and Newton County, Indiana. Surveyed in 1934-1935.
Imprint: [Washington, D.C.] : Geological Survey, [1939]
Dimensions: 45 x 42 cm or smaller; Scale: 1:62,500